Speedway Motors, Modified, 700R4 Parts

This resource contains a transmission pan shape ID chart and other tips to help with identifying GM transmissions.

The 700R4 is a great choice when it's time to upgrade your classic car or truck with an overdrive transmission. Here's what you need to know about GM's famous 4-speed automatic.

We show you how to keep that old GM transmission when swapping in an LS engine. Our LS swap adapter kits make it easy!

Follow along as Jeff installs an early 700R4 transmission for the big block in his 1967 Chevelle. See how this unit is upgraded and converted to a later 30 spline style.

Speedway Motors announced today the introduction of a new IMCA Modified Spec Racing Engine as they kick off the 2025 race season along with discounts Jan. 27-Feb. 2 to help their customers get ready for race season.

Pat talks about some of the LS engine mounts Speedway Motors has to offer.

This little Nova is loaded with G-Comp suspension, big tires, and a nasty LS engine. It's a mean autocross machine, even if it seems like an unlikely candidate.

Speedway Motors announced today it will celebrate racers and the sport of racing with Racer Appreciation Week, Jan. 23-29.

Speedway Motors announced today it will celebrate racers and the sport of racing with Racer Appreciation Week, Feb. 21-27, which will include giveaways, discounts and features throughout the week.

This old sedan was untouchable in the early 60's.